Designing and developing serious games for users with intellectual disabilities is a very challenging task. We want to improve independent living of dawn syndrome patients with a videogame for helping them to navigate the Madrid metro system. But we want to systematize the work and we are looking for a methodology to ease the creation of games for Down syndrome users. We have analyzed the literature and we are looking for proven works on games to create a methodology. We also plan to use learning analytics for knowing how the game works and user problems but based on actual interaction data